Abstract:
A small-diameter continuous-wave far-infrared (FIR) laser that can provide approximately 100-MHz spectrally pure tunability has been developed and studied both experimentally and theoretically. Operation of this laser at pressures significantly greater than the maximum allowed by previously accepted theory yields the larger tunability. The model includes additional high-energy vibrational states and appropriate energy transfer mechanisms that fundamentally alter the behavior in the high-pressure, high-pump-intensity regime. Although **1**3CH//3F is used for both the experimental demonstration and the theoretical model, the concept is general and should apply to all diffusion-deactivated FIR lasers.
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